Hummer 2007 H3 Owner's Manual page 194

3. To view the next available mode, press and
hold the reset stem for about two seconds.
Release the reset stem and press and
hold again to view each mode.
4. Once the desired mode is shown on the DIC
display, briefly press the reset stem to set
your choice. The DIC display will then clear.
The following are the available modes:
Lock 1 (default): On vehicles with an automatic
transmission, this mode locks all of the doors
when the vehicle is shifted out of PARK (P) and
unlocks all of the doors when the vehicle is shifted
into PARK (P).
On vehicles with a manual transmission, this
mode locks all of the doors when the vehicle
speed is greater than 15 mph (24 km/h) and
unlocks all of the doors when the key is removed
from the ignition.
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Lock 2: On vehicles with an automatic
transmission, this mode locks all of the doors
when the vehicle is shifted out of PARK (P) and
unlocks the driver's door when the vehicle is
shifted into PARK (P).
On vehicles with a manual transmission, this
mode locks all of the doors when the vehicle
speed is greater than 15 mph (24 km/h) and
unlocks the driver's door when the key is removed
from the ignition.
Lock 3: On vehicles with an automatic
transmission, this mode locks all of the doors
when the vehicle is shifted out of PARK (P).
The doors will not automatically unlock.
On vehicles with a manual transmission, this
mode locks all of the doors when the vehicle
speed is greater than 15 mph (24 km/h).
The doors will not automatically unlock.